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Received: from viro by zeniv.linux.org.uk with local (Exim 4.99 #2 (Red Hat Linux)) id 1veQB9-000000085b2-38Zo; Sat, 10 Jan 2026 04:02:19 +0000 From: Al Viro To: linux-mm@kvack.org Cc: Vlastimil Babka , Harry Yoo , linux-fsdevel@vger.kernel.org, Linus Torvalds , Christian Brauner , Jan Kara , Mateusz Guzik , linux-kernel@vger.kernel.org Subject: [RFC PATCH 13/15] turn fs_cachep static-duration Date: Sat, 10 Jan 2026 04:02:15 +0000 Message-ID: <20260110040217.1927971-14-viro@zeniv.linux.org.uk> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260110040217.1927971-1-viro@zeniv.linux.org.uk> References: <20260110040217.1927971-1-viro@zeniv.linux.org.uk> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 2E036C0006 X-Stat-Signature: 41eg31q81nco8ookzoie543afsp9ajoi X-Rspam-User: X-HE-Tag: 1768018777-731447 X-HE-Meta: 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 FjfFFQuH 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Signed-off-by: Al Viro --- include/linux/fs_struct.h | 3 ++- kernel/fork.c | 4 ++-- 2 files changed, 4 insertions(+), 3 deletions(-) diff --git a/include/linux/fs_struct.h b/include/linux/fs_struct.h index 0070764b790a..e8c9fac5b7b7 100644 --- a/include/linux/fs_struct.h +++ b/include/linux/fs_struct.h @@ -15,7 +15,8 @@ struct fs_struct { struct path root, pwd; } __randomize_layout; -extern struct kmem_cache *fs_cachep; +extern struct kmem_cache_opaque fs_struct_cache; +#define fs_cachep to_kmem_cache(&fs_struct_cache) extern void exit_fs(struct task_struct *); extern void set_fs_root(struct fs_struct *, const struct path *); diff --git a/kernel/fork.c b/kernel/fork.c index 8f0dfefd82f0..7262abd0d2a4 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -476,7 +476,7 @@ struct kmem_cache_opaque sighand_cache; struct kmem_cache_opaque files_cache; /* SLAB cache for fs_struct structures (tsk->fs) */ -struct kmem_cache *fs_cachep; +struct kmem_cache_opaque fs_struct_cache; /* SLAB cache for mm_struct structures (tsk->mm) */ static struct kmem_cache_opaque mm_cache; @@ -3035,7 +3035,7 @@ void __init proc_caches_init(void) sizeof(struct files_struct), 0, SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_ACCOUNT, NULL); - fs_cachep = kmem_cache_create("fs_cache", + kmem_cache_setup(fs_cachep, "fs_cache", sizeof(struct fs_struct), 0, SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_ACCOUNT, NULL); -- 2.47.3